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json-c/CMakeLists.txt

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CMake
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# Many projects still are stuck using CMake 2.8 is several places so it's good to provide backward support too. This is
# specially true in old embedded systems (OpenWRT and friends) where CMake isn't necessarily upgraded.
cmake_minimum_required(VERSION 2.8)
# JSON-C library is C only project.
project(json-c C)
# If we've got 3.0 then it's good, let's provide support. Otherwise, leave it be.
if(POLICY CMP0038)
# Policy CMP0038 introduced was in CMake 3.0
cmake_policy(SET CMP0038 NEW)
endif()
if(POLICY CMP0054)
cmake_policy(SET CMP0054 NEW)
endif()
# Set some packaging variables.
set(CPACK_PACKAGE_NAME "${PROJECT_NAME}")
set(CPACK_PACKAGE_VERSION_MAJOR "0")
set(CPACK_PACKAGE_VERSION_MINOR "13")
set(CPACK_PACKAGE_VERSION_PATCH "99")
set(JSON_C_BUGREPORT "json-c@googlegroups.com")
include(CheckSymbolExists)
include(CheckIncludeFile)
include(CheckIncludeFiles)
include(CheckCSourceCompiles)
include(CheckTypeSize)
include(CPack)
include(GNUInstallDirs)
include(CMakePackageConfigHelpers)
option(BUILD_SHARED_LIBS "Default to building shared libraries" ON)
# Enable or disable features. By default, all features are turned off.
option(ENABLE_RDRAND "Enable RDRAND Hardware RNG Hash Seed" OFF)
option(ENABLE_THREADING "Enable partial threading support." OFF)
option(HAS_GNU_WARNING_LONG "Define if .gnu.warning accepts long strings." OFF)
if (UNIX OR MINGW OR CYGWIN)
list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
endif()
if (UNIX)
list(APPEND CMAKE_REQUIRED_LIBRARIES m)
endif()
if (MSVC)
list(APPEND CMAKE_REQUIRED_DEFINITIONS /D_CRT_SECURE_NO_DEPRECATE)
list(APPEND CMAKE_REQUIRED_FLAGS /wd4996)
endif()
check_include_file("fcntl.h" HAVE_FCNTL_H)
check_include_file("inttypes.h" HAVE_INTTYPES_H)
check_include_file(stdarg.h HAVE_STDARG_H)
check_include_file(strings.h HAVE_STRINGS_H)
check_include_file(string.h HAVE_STRING_H)
check_include_file(syslog.h HAVE_SYSLOG_H)
check_include_files("stdlib.h;stdarg.h;string.h;float.h" STDC_HEADERS)
check_include_file(unistd.h HAVE_UNISTD_H)
check_include_file(sys/types.h HAVE_SYS_TYPES_H)
check_include_file("dlfcn.h" HAVE_DLFCN_H)
check_include_file("endian.h" HAVE_ENDIAN_H)
check_include_file("limits.h" HAVE_LIMITS_H)
check_include_file("locale.h" HAVE_LOCALE_H)
check_include_file("memory.h" HAVE_MEMORY_H)
check_include_file(stdint.h HAVE_STDINT_H)
check_include_file(stdlib.h HAVE_STDLIB_H)
check_include_file(sys/cdefs.h HAVE_SYS_CDEFS_H)
check_include_file(sys/param.h HAVE_SYS_PARAM_H)
check_include_file(sys/stat.h HAVE_SYS_STAT_H)
check_include_file(xlocale.h HAVE_XLOCALE_H)
if (HAVE_INTTYPES_H AND NOT MSVC)
set(JSON_C_HAVE_INTTYPES_H 1)
endif()
check_symbol_exists(_isnan "float.h" HAVE_DECL__ISNAN)
check_symbol_exists(_finite "float.h" HAVE_DECL__FINITE)
if ((MSVC AND NOT (MSVC_VERSION LESS 1800)) OR MINGW OR CYGWIN OR UNIX)
check_symbol_exists(INFINITY "math.h" HAVE_DECL_INFINITY)
check_symbol_exists(isinf "math.h" HAVE_DECL_ISINF)
check_symbol_exists(isnan "math.h" HAVE_DECL_ISNAN)
check_symbol_exists(nan "math.h" HAVE_DECL_NAN)
endif()
check_symbol_exists(_doprnt "stdio.h" HAVE_DOPRNT)
if (UNIX OR MINGW OR CYGWIN)
check_symbol_exists(snprintf "stdio.h" HAVE_SNPRINTF)
endif()
check_symbol_exists(vasprintf "stdio.h" HAVE_VASPRINTF)
check_symbol_exists(vsnprintf "stdio.h" HAVE_VSNPRINTF)
check_symbol_exists(vprintf "stdio.h" HAVE_VPRINTF)
if (HAVE_FCNTL_H)
check_symbol_exists(open "fcntl.h" HAVE_OPEN)
endif()
if (HAVE_STDLIB_H)
check_symbol_exists(realloc "stdlib.h" HAVE_REALLOC)
endif()
if (HAVE_LOCALE_H)
check_symbol_exists(setlocale "locale.h" HAVE_SETLOCALE)
check_symbol_exists(uselocale "locale.h" HAVE_USELOCALE)
endif()
if (HAVE_STRINGS_H)
check_symbol_exists(strcasecmp "strings.h" HAVE_STRCASECMP)
check_symbol_exists(strncasecmp "strings.h" HAVE_STRNCASECMP)
endif()
if (HAVE_STRING_H)
check_symbol_exists(strdup "string.h" HAVE_STRDUP)
check_symbol_exists(strerror "string.h" HAVE_STRERROR)
endif()
if (HAVE_SYSLOG_H)
check_symbol_exists(vsyslog "syslog.h" HAVE_VSYSLOG)
endif()
if (MSVC)
check_symbol_exists(strtoll "stdlib.h" HAVE_STRTOLL)
set(json_c_strtoll "strtoll")
if (NOT HAVE_STRTOLL)
# Use _strtoi64 if strtoll is not available.
check_symbol_exists(_strtoi64 "stdlib.h" __have_strtoi64)
if (__have_strtoi64)
set(HAVE_STRTOLL 1)
set(json_c_strtoll "_strtoi64")
# could do the same for strtoull, if needed
endif()
endif()
endif()
check_type_size(int SIZEOF_INT)
check_type_size(int64_t SIZEOF_INT64_T)
check_type_size(long SIZEOF_LONG)
check_type_size("long long" SIZEOF_LONG_LONG)
check_type_size("size_t" SIZEOF_SIZE_T)
check_c_source_compiles(
"int main() { int i, x = 0; i = __sync_add_and_fetch(&x,1); return x; }"
HAVE_ATOMIC_BUILTINS)
check_c_source_compiles(
"__thread int x = 0; int main() { return 0; }"
HAVE___THREAD)
if (HAVE___THREAD)
set(SPEC___THREAD __thread)
elseif (MSVC)
set(SPEC___THREAD __declspec(thread))
endif()
# Hardware random number is not available on Windows? Says, config.h.win32. Best to preserve compatibility.
if (WIN32)
set(ENABLE_RDRAND 0)
endif()
# Once we've done basic symbol/header searches let's add them in.
configure_file(${PROJECT_SOURCE_DIR}/cmake/config.h.in ${PROJECT_BINARY_DIR}/config.h)
message(STATUS "Written ${PROJECT_BINARY_DIR}/config.h")
configure_file(${PROJECT_SOURCE_DIR}/cmake/json_config.h.in ${PROJECT_BINARY_DIR}/json_config.h)
message(STATUS "Written ${PROJECT_BINARY_DIR}/json_config.h")
configure_package_config_file(
"cmake/Config.cmake.in"
${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake
INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
)
if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ffunction-sections -fdata-sections")
# There's a catch here.
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror")
add_definitions(-D_GNU_SOURCE)
elseif ("${CMAKE_C_COMPILER_ID}" STREQUAL "MSVC")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /DEBUG")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /wd4100")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /wd4996")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /wd4244")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /wd4706")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /wd4702")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /wd4127")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /wd4701")
endif()
set(JSON_C_PUBLIC_HEADERS
${PROJECT_BINARY_DIR}/config.h
${PROJECT_BINARY_DIR}/json_config.h
${PROJECT_SOURCE_DIR}/json.h
${PROJECT_SOURCE_DIR}/arraylist.h
${PROJECT_SOURCE_DIR}/debug.h
${PROJECT_SOURCE_DIR}/json_c_version.h
${PROJECT_SOURCE_DIR}/json_inttypes.h
${PROJECT_SOURCE_DIR}/json_object.h
${PROJECT_SOURCE_DIR}/json_object_iterator.h
${PROJECT_SOURCE_DIR}/json_pointer.h
${PROJECT_SOURCE_DIR}/json_tokener.h
${PROJECT_SOURCE_DIR}/json_util.h
${PROJECT_SOURCE_DIR}/linkhash.h
${PROJECT_SOURCE_DIR}/printbuf.h
)
set(JSON_C_HEADERS
${JSON_C_PUBLIC_HEADERS}
${PROJECT_SOURCE_DIR}/json_object_private.h
${PROJECT_SOURCE_DIR}/random_seed.h
${PROJECT_SOURCE_DIR}/strerror_override.h
${PROJECT_SOURCE_DIR}/strerror_override_private.h
${PROJECT_SOURCE_DIR}/math_compat.h
${PROJECT_SOURCE_DIR}/snprintf_compat.h
${PROJECT_SOURCE_DIR}/strdup_compat.h
${PROJECT_SOURCE_DIR}/vasprintf_compat.h
)
set(JSON_C_SOURCES
${PROJECT_SOURCE_DIR}/arraylist.c
${PROJECT_SOURCE_DIR}/debug.c
${PROJECT_SOURCE_DIR}/json_c_version.c
${PROJECT_SOURCE_DIR}/json_object.c
${PROJECT_SOURCE_DIR}/json_object_iterator.c
${PROJECT_SOURCE_DIR}/json_pointer.c
${PROJECT_SOURCE_DIR}/json_tokener.c
${PROJECT_SOURCE_DIR}/json_util.c
${PROJECT_SOURCE_DIR}/json_visit.c
${PROJECT_SOURCE_DIR}/linkhash.c
${PROJECT_SOURCE_DIR}/printbuf.c
${PROJECT_SOURCE_DIR}/random_seed.c
${PROJECT_SOURCE_DIR}/strerror_override.c
)
include_directories(${PROJECT_SOURCE_DIR})
include_directories(${PROJECT_BINARY_DIR})
# If -DBUILD_SHARED_LIBS is set in the CMake command-line, we'll be able to create shared libs, otherwise this would
# generate static libs. Good enough for most use-cases unless there's some serious requirement to create both
# simultaneously.
add_library(${PROJECT_NAME}
${JSON_C_SOURCES}
${JSON_C_HEADERS}
)
# If json-c is used as subroject it set to target correct interface -I flags and allow
# to build external target without extra include_directories(...)
set_property(TARGET ${PROJECT_NAME} PROPERTY
INTERFACE_INCLUDE_DIRECTORIES ${PROJECT_SOURCE_DIR} ${PROJECT_BINARY_DIR}
)
install(TARGETS ${PROJECT_NAME}
RUNTIME DESTINATION bin
LIBRARY DESTINATION lib
ARCHIVE DESTINATION lib
)
if (UNIX OR MINGW OR CYGWIN)
configure_file(json-c.pc.in json-c.pc @ONLY)
set(INSTALL_PKGCONFIG_DIR "${CMAKE_INSTALL_PREFIX}/lib/pkgconfig" CACHE PATH "Installation directory for pkgconfig (.pc) files")
install(FILES ${PROJECT_BINARY_DIR}/json-c.pc DESTINATION "${INSTALL_PKGCONFIG_DIR}")
endif ()
install(FILES ${JSON_C_PUBLIC_HEADERS} DESTINATION ${CMAKE_INSTALL_PREFIX}/include/json-c)
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